Frederick william thomson



(No Model.)

F. W. THOMSON.

WINDLASS.

..No. 334,682. Patented Jan. 19, 1886.

INVENTOR:

mw Q BY Jaw/m ATTORNEYS.

N. PETERS, Phnlo-Lilhognpher. Washmghm. n.c.

UNITED STATES PATENT OFFICE.

FREDERICK WILLIAM THOMSON, or MAITLAND, COUNTY OF HANTS, NOVA SCOTIA, oANADA.

WINDLASS.

SPECIFICATION forming part of Letters Patent No.334,682, dated January 19,1886.

Application filed June 27, 1885. Serial No. 169,952.

To all whom it may concern:

Be it known that I, FREDERICK W. THOM- SON, of Maitland, in the county of Hants,

Province of Nova Scotia, and Dominion of 5 Canada, have invented a new and Improved Windlass, of which the following is a full, clear, and exact description.

The object of my invention is to improve the construction of ships windlasses in such manner that they can be worked more easily and safely.

The invention consists in particular constructions and combinations of parts of the Windlass, including a novel arrangement of friction band-wheels and bands, with a contrivance of brake mechanism comprising brakeshoes, which may be forced against the interior faces of flanges on the main grabs or purchase-wheels, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures. v

Figure 1 is afront elevation of the Windlass, partly in section; and Fig. 2 is a vertical sectional elevation taken on the line was, Fig. 1.

The letters A A indicate opposite posts or stanchions, in which the Windlass-shaft B is journaled, and 0 Care the barrels, mounted, as usual, on the opposite ends of the shaft. The main working parts of the Windlass are made in two sections, constructed alike, and each working section is placed on the shaft B, between one of the posts A and the hold backratchet D,which is fixed to the center of shaft B, and is engaged by the heavy pawl E,which is pivoted on the post F, set behind the ratchet.

I will describe in detail the construction of one working section of the windlass,which de scription will answerfor both sections.

On the shaft B is placed loosely the grab or main purchase-wheel G, the inner part of which has a projecting peripheral flange or rim, 9, the inner face of which flange is finished suitably to receive the pressure of the outer faces of the brakeshoes, presently described.

The letterH indicates a disk-wheel, which is fixed to the shaft B, and, preferably, by means of a key entering the elongated hub h of the disk-wheel and a slot in the shaft. The disk- (No model.)

wheel H has a peripheral groove to receive a band, I, which passes quite around wheel H, and is connected at opposite ends with a link, J, and at opposite sides ofa pin, j, which pivots said link to a block, K, which is held loosely to the wheel H by inwardly-projecting flanges 7c and the block engaging the annular shoulders h of the said wheel. The link J of the block K of each windlasssection is connected by a rod, L, with the hand brake-lever M, which is pivoted on or to the pawl-post F, so that when the lever M is rocked by means of its capstan-bars m m the opposite wheels H H will be turned by the grip of the frictionbands I on the alternate upstrokes of the rods L, the respective bands I loosening on the downstrokes of the rods. The hub h of band-wheel H preferably is squared at its inner part next the grab G, and the body of wheel H is apertured, as at h", so that the gear-wheels or pinions N may be placed next the hub h, and the shaft n of the pinions he stepped in bearings in the hub at their inner ends.

At the inner face of band-wheel H, and radiating 'from its hub h, are formed the webs or ribs h, at the outer ends of which are formed the projecting heads hflbetween opposite pairs of which are fitted the brake-shoes O, the ends of which shoes are fitted to the heads by tongue-and-groove or dovetailed joints, and so that the shoes may be moved outward to bring their curved outer 'faces into contact with the inner face of the flange g of the grab 8 5 G, or may be drawn back from the flange.

The shafts n of pinions N, on which the pinionsare fixed, pass through and fit threaded nuts n, which are fixed to the brake-shoes O, the shoes being recessed or bored at o, to re- 0 ceive loosely the outer ends of the shafts a.

On the hub h of band-wheel H is placed loosely the disk-wheel P, which has an annular toothed rim or gear wheel, R, formed on it, and so as to engage the teeth of the pinions N, connected to all of the brake-shoes 0, four of said shoes being shown; but a greater or less number may be used, if desired.

In the periphery of the disk gear-wheel P are formed a series of holes, S, to receive a mo bar for turning the wheel. A collar, T, on hub h, outside of the wheel 1?, holds the wheel to place and into engagement with the pinions N.

The operation is as follows: \Vhen the grabs G, one or both, are to be operated by the brakes M an, the disk gear-wheel P will be turned by a bar placed in one of its holes S, so as to rotate the pinions N, and force the shoes 0 to the rims g of the grabs G, to bind said grabs fast, so they will be turned as the wheels H are turned by the bands I, and the hold of the shoes 0 on the grabs y will be secure to prevent slip of the grabs, and when the anchors are to be letgo itonly is necessary to turn the disk gearwhcel P the other way more or less, so as to ease the friction -grip of the shoes 0 on the grabs, to let the anchors run out slowly or to allow the anchors to run out free; and to hoist the anchors it only is necessary to tighten the shoes 0 on the grabs G and operate the brakes him, the pawl E then being down on the ratchet.

To give further security in holding the anchors or when riding at anchor than the pawl E and friction brakeshoes alone would afford, I employ the bands V, which are conneeted at one end, a, to adeck-bloek, V, and after being passed around the grabs in circumferential grooves 12' thereof, the other ends of the bands are connected at o" to screw-shafts W, which are passed freely through holes in the blocks V, and receive nuts w at the outer faces of the blocks, so that by screwing up the nuts the bands V may be tightened on the grabs G at any time required.

\Vhen using the windlass-barrelsC to wear ship, or for hoisting or other purposes, the brake shoes 0 may be released from grabs G, and the bands V may be tightened on the grabs to hold them at rest while the shaft B turns in the grabs, and the bands V may be used to hold the anchor whilethe brakes M m are operated for turning the barrels C, the shoesO then being loose from the grabs G.

The gear=wheel P may be placed directly on the Windlass-shaft B, if desired, and the brake-rods L will be arranged to connect with the brake-lever M at varying distances from the pivot of the lever, to shorten or lengthen the range of movement of the block K as the brakes are operated.

It is evident that the wheels G may be thrown into and out of gear very quickly, and also that the windlass may be operated effectively with economy of time and labor.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The combination, in a Windlass, and with its shaft B, of a grab, G, loose thereon and having a rim-flange, g, the brake-shoes O, fitted for movement to and from said flange, screw-shafts a, pinions N on shafts n, and the adj nsting gear-wheel P, substantially as herein set forth.

2. The combination, in a windlass, and with its shaft and a loose grab thereon, having a projecting rim-flange, of a drivewheel, a friction driving-band on said wheel, and brakeshoes fitted on the drive-wheel so as to move to and from the flange on the grab, substantially as herein set forth.

3. In a Windlass, the combination, with the shaft B and a grab, G, loose thereon and having a rim-flange, g, ofa band-wheel, H, fixed -to shaft B, brake-shoes O, fitted to wheel II and adapted to said flange 9, pinions N on shafts a, supported in hub h of wheel H and threaded into shoes 0, a disk-wheel, P, having a gear, R, meshing with pinions N, and a friction driving-band encircling wheel H, substantially as herein set forth.

4. The combination, in a windlass, of the shaft B, grabs G, loose on shaft B, and having flanges g, wheels H, drivingbands I on wheels H, brake-shoes 0, adapted to flanges g, screwshafts n, pinions N on said shafts, a gearwheel, P, meshing with pinions N, links J, connected to bands 1, blocks K, rods L, and brakes M m, all constructed and adapted for operation substantially as herein set forth.

5. In a Windlass, the drive-wheel H, made with a peripheral groove to receive the driving-band I, and with face projections h, adapted to support and guide the brake-shoes O, substantially as herein set forth.

6. In a Windlass, the combination, with the shaft B, grabs G, and a friction brake mechanism, substantially as described, connecting said wheels to the drive-wheels H, of theholdback-bands V, substantially as herein set forth.

FREDERICK WILLIAM THOMSON.

Witnesses:

H. T. HARDING, ARCHD. FRAME. 

